Moen Flo 3/4" Smart Home Water Monitoring and Leak Detection System
Protect your property and gain total control over your water with the Moen Flo 3/4" Smart Home Water Monitoring and Leak Detection System (900-001). This all-in-one security system for your plumbing provides 24/7 protection against leaks and water damage, making it an essential investment for any homeowner or property manager. By proactively monitoring your home's water, the Flo Smart Water Monitor and Shutoff offers unparalleled peace of mind, whether you're at home or away.
Key Features
Automatic Leak Detection & Water Shutoff
Using FloSense™ technology, the system continuously learns your home's normal water usage patterns to identify unusual flow, running water, and leaks as small as a drop per minute. When a significant leak is detected, the valve can automatically shut off your home's water supply to help minimize water damage.
Whole-Home Water Monitoring
Installed on the main water line, the Flo Smart Water Monitor tracks flow rate, water pressure, and temperature throughout your plumbing system. It continuously analyzes system performance to help identify hidden leaks, plumbing issues, and unusual water usage before they become expensive problems.
Remote Monitoring & Control Through the Moen Smart Water App
Monitor your home's water system from virtually anywhere using the Moen Smart Water App. View real-time water usage, receive leak and pressure alerts, remotely turn your water on or off, create water usage goals, and run on-demand Health Tests to check for potential plumbing leaks directly from your smartphone.
Smart Alerts & Proactive Maintenance
The system provides instant notifications for leaks, unusual water activity, pressure changes, and other plumbing events through the Moen Smart Water App. These proactive alerts help homeowners respond quickly to potential problems, reducing the risk of costly repairs and unexpected water damage.
Smart Home Integration
The Flo Smart Water Monitor integrates with Amazon Alexa, Google Assistant, IFTTT, and Control4, allowing it to work alongside compatible smart home systems for convenient monitoring and automation.
Product Details
- Smart whole-home water monitoring and leak detection system
- Automatic, manual, and remote water shutoff capability
- Detects leaks as small as one drop per minute
- Monitors water flow, pressure, and temperature
- FloSense™ intelligent water monitoring technology
- Remote monitoring through the Moen Smart Water App
- Manual Health Tests for leak detection
- Water usage tracking and conservation insights
- Compatible with Amazon Alexa, Google Assistant, IFTTT, and Control4
- Fits 3/4" main water supply lines
- Maximum operating pressure: 175 PSI
- Includes 3/4" NPT brass tailpieces, AC power adapter, installation spacer, spare O-rings, and installation hardware
- One-year limited warranty
Our Expert Review: Moen Flo 3/4" Smart Home Water Monitoring and Leak Detection System
Summary
Having advised homeowners on smart plumbing solutions, I can say the Moen Flo is a game changer in proactive home protection. It strikes a powerful balance between advanced technology and critical home utility. While its high cost and comes with a short warranty, the ability to automatically shut off the water during a catastrophic leak makes it one of the most valuable investments for your home. For homeowners who travel, own second properties, or have high-end finishes, this is a must-have.
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Performance: 5/5 
The Moen Flo does it's job! The proprietary MicroLeak™ Detection runs daily health tests on your entire system, catching leaks as small as one drop per minute. This level of granular, non-stop monitoring is unparalleled. It doesn't just monitor for floods; it helps you catch tiny, insidious leaks that rack up water bills. Think of the toilet in your basement that you never use, running your water bill up.
User Experience: 4/5 
The app is clean, informative, and provides real-time data on water usage, flow, and pressure. Remote water shutoff is a huge win for homeowners on vacation. Installation requires a professional plumber, adding significant cost. Furthermore, the FloSense technology takes time to learn your habits and can occasionally trigger frustrating false positives during unusual high-flow events (like having a party or filling a hot tub, sounds like a party!) You will need to remember to use the sleep mode in the app so your party isn't stopped short because water turned off all of a sudden.
Quality: 3.5/5 
The unit feels like a quality piece of equipment. However, the score is lower due to recurring reports from homeowners about the unit failing prematurely after the first year. For a high-cost, high-importance plumbing fixture, the standard one-year limited warranty is simply too short. While many units perform perfectly for years, the uncertainty around long-term durability and the high replacement cost is a concern that must be factored in.
Value: 3/5
The upfront cost of the unit plus professional installation is an investment. For the average homeowner, it's a hard pill to swallow. The value is only realized if the unit prevents a major water event or if you receive a significant, long-term discount on your home insurance premium. For high-risk homes, the value is higher, as a major leak can cost tens of thousands in repairs. Its value is weighted heavily toward catastrophe prevention rather than immediate utility.
Final Verdict
If you are looking for defense against water damage, the Moen Flo 3/4" Smart Water Monitoring System is a clear winner. The peace of mind offered by the automatic shutoff and continuous MicroLeak detection is worth the price for many. Be sure your Wi-Fi signal is strong where the unit will be installed on your main water line. A weak signal will severely hamper the system's ability to communicate alerts quickly.
Additional Details
- Brand: Moen
- MPN: 900-001
- Pipe Size: 3/4" NPT
- Installation: Main cold water supply line
- Power: 12V DC AC Adapter (included)
- Connectivity: 2.4 GHz Wi-Fi
- Maximum Operating Pressure: 175 PSI
- App Compatibility: iOS & Android
- Smart Home Compatibility: Amazon Alexa, Google Assistant, IFTTT, Control4
- Included: 3/4" brass tailpieces, AC adapter, installation spacer, spare O-rings, hex key
Moen has been a trusted leader in plumbing innovation for decades, designing products that combine reliability, smart technology, and everyday convenience.
Moen Flo Smart Water Monitor FAQ
What does the Moen Flo Smart Water Monitor do?
The Moen Flo Smart Water Monitor continuously monitors your home's water flow, pressure, and temperature to detect leaks and abnormal water usage. If a potential leak is detected, it can send real-time alerts and automatically shut off your home's water supply to help prevent water damage.
Can the Moen Flo automatically shut off my water?
Yes. When FloSense™ detects a significant leak or abnormal water event, the system can automatically close the valve to help minimize water damage. Homeowners can also manually control the valve remotely through the Moen Smart Water App.
What information can I see in the Moen Smart Water App?
The Moen Smart Water App allows you to monitor real-time water usage, pressure, flow rate, and temperature, receive maintenance and leak alerts, remotely control your water supply, run Health Tests, and create customized water usage goals.
Does the Moen Flo Smart Home Water Monitoring and Leak Detection System require Wi-Fi?
Yes. A 2.4 GHz Wi-Fi connection is required to enable remote monitoring, app notifications, and smart home integrations. The system also requires continuous power from a nearby electrical outlet.
Where should the Moen Flo be installed?
The 900-001 system should be professionally installed on the accessible main cold water supply line after the water meter and pressure-reducing valve (if present). Proper installation allows the device to monitor and protect your home's entire plumbing system.
